nickelgold

Nickelgold is an alloy composed primarily of nickel with a substantial proportion of gold, engineered to combine the color and ductility of gold with increased hardness and wear resistance. The exact composition varies by manufacturer, but higher gold content yields a warmer yellow color, while higher nickel content increases hardness and opacity. The term is used both for bulk nickel-gold alloys and for electroplated finishes that imitate gold while offering improved durability.

Bulk nickel-gold alloys are produced by melting and alloying nickel and gold, then casting or forging the resulting material for use in jewelry, decorative hardware, or specialized components. In plating applications, a nickel-rich gold-nickel alloy is deposited over a base metal to produce a durable, gold-like surface. Nickel gold finishes are popular in watch cases, jewelry clasps, and electronics housings where a gold tone is desired but pure gold would be too soft or costly.

Safety and regulation: Nickel can provoke allergic reactions in some people, and nickel release from alloys or plating can cause dermatitis. To mitigate this, many jurisdictions regulate nickel content and require plating with low nickel release for consumer products, particularly jewelry and children’s items. Users with nickel sensitivity should verify product specifications.

See also: nickel silver, gold plating, electroplating, alloy.